Titans general manager Jon Robinson and coach Mike Mularkey will scout tight ends during the NFL Combine from Tuesday to March 6 in Indianapolis.

The Titans have eight draft picks, including the fifth and 18th overall, and could use an injection of youth at the position.

Delanie Walker remains one of Marcus Mariota’s favorite targets and just went to his second consecutive Pro Bowl, but he turns 33 before the start of next season. Anthony Fasano, 32, and Phillip Supernaw, 27, are free agents.

Here are five tight ends to watch as we inch closer to the NFL draft from April 27-29 in Philadelphia:

O.J. Howard, Alabama, senior

6-foot-6, 249 pounds

The premier tight end prospect coming out of college this season, Howard will likely command a first-round draft pick and could be a target for the Titans, especially if Robinson manages to trade down from fifth overall. He’s big, fast and catches the ball with ease, but needs to improve as a blocker. Some analysts also question his desire, but he's starred on the big stage. Howard’s elite potential was evident when he caught five passes for 208 yards and two touchdowns in the 2015 national championship game.

David Njoku, Miami, junior

6-4, 240

A work in progress with elite upside, Njoku had 43 catches for 698 yards and eight touchdowns last season, the second-most scores on the team. He was also second with 16.2 yards per catch. Njoku was a national high jump champion in high school and is a nightmare in the red zone, where the Titans have been efficient.

Evan Engram, Mississippi, senior

6-3, 236

Engram had a team-high 65 catches for 926 yards and eight touchdowns last season. He has the speed to thrive on seam routes, where Mariota and Walker often hook up, and is able to catch balls thrown anywhere near him. He’s not a great blocker, according to analysts, which limits his upside. Engram could be a second-day selection, particularly if he drops into the third round, where the Titans have two picks.

Bucky Hodges, Virginia Tech, senior

6-7, 245

Hodges has excellent size and the ability to line up in the slot or outside. He had 48 catches for 691 yards and seven touchdowns last season, and more than a quarter of his catches went for longer than 20 yards. A former quarterback, he’s able to find the weak spots in coverages. But he needs to improve as a blocker.

Jordan Leggett, Clemson, senior

6-5, 258

Leggett had 46 catches for 736 yards and seven touchdowns last season as the Tigers won the national championship. He was a finalist for the John Mackey Award, given to the nation’s top tight end. That went to Michigan’s Jake Butt, who tore the ACL in his right knee in the Orange Bowl. Leggett also starred as a junior, when he had 40 catches for 525 yards and eight touchdowns. He’s a reliable target, with just two drops over the last two seasons, which the Titans will find appealing.